抄録
The ridging perforomance of three kinds of commercial ridgers were compared on upland field and rice stubble field. The tests were performed by using the small tractor attached with the rotary tillage apparatus. The characteristics of the ridging were summarized as follows.
1) The ridging resistance increased when the angle β and γ of ridger (see Fig. 1) was larger on every conditions.
2) The effect of soil hardness of fields on the ridging resistance could not be recognized in the tsest.
3) The rotor shaft torque and power increased when the ridging resistance was smaller.
4) The power ratio between the rotor shaft and wheel shaft in the ridging depended on the ridging resistatance and the soil hardness of fields.
5) The load on the depth adjusting wheel increased as the depth increased, but it decreased when the depth was over 10cm, while the load on the driving wheel decreased as the depth increasd.
6) The kinematic equilibrium in the ridging depenped largely on the relationship in the ridging resistance and the tilling resistance.
